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Preparation method and application of a hydrogen peroxide enzyme-free sensor based on molybdenum sulfide composite material

A composite material, hydrogen peroxide technology, applied in the direction of material electrochemical variables, etc., can solve the problems of limiting wide application and affecting the convenience of operation, and achieve the effect of high selective detection, convenient operation, and loose detection environment requirements.

Inactive Publication Date: 2018-06-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the electrochemiluminescence sensor requires external light signal capture devices such as photodiodes, and the photoelectrochemical sensor requires an external light source to excite the photosensitive material, this affects the convenience of the operation of the two to a certain extent and limits them. Wider application in actual production and life

Method used

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  • Preparation method and application of a hydrogen peroxide enzyme-free sensor based on molybdenum sulfide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Example 1 A hydrogen peroxide enzyme-free sensor based on molybdenum sulfide composite material, the specific preparation steps are:

[0035] (1) Zn-MoS 2 Preparation of:

[0036] 0.005 g zinc chloride ZnCl 2 , 2 mL of 0.1 mol / L ascorbic acid solution, 0.5 mL of sodium molybdate Na 2 MoO 4 solution and 0.01 g sodium sulfide Na 2 S, after mixing and stirring for 15 minutes, put it into the reaction kettle, and react for 16 hours at 150°C; after cooling to room temperature, use deionized water to wash centrifugally, and vacuum-dry at 40°C to obtain Zn-MoS 2 , which was dissolved in deionized water to obtain Zn-MoS 2 solution.

[0037] (2) Preparation of ECL working electrode W1:

[0038] 1) Using ITO conductive glass as the working electrode, drop-coat the Zn-MoS prepared in (1) on the surface of the electrode 2 solution, covering an area of ​​1 cm × 1 cm, and allowed to dry at room temperature;

[0039] 2) Immerse the working electrode obtained in 1) into the ele...

Embodiment 2

[0054] Example 2 A hydrogen peroxide enzyme-free sensor based on molybdenum sulfide composite material, the specific preparation steps are:

[0055] (1) Zn-MoS 2 Preparation of:

[0056] The preparation steps are the same as that of Zn-MoS in Example 1 2 The method of preparation of the solution differs in: ZnCl 2 The addition amount of ascorbic acid solution is 0.008 g, the addition amount of ascorbic acid solution is 4 mL, Na 2 MoO 4 The amount of solution added was 1.0 mL and Na 2 The amount of S added was 0.02 g, and the reaction was carried out at 220° C. for 12 hours.

[0057] (2) Preparation of ECL working electrode W1:

[0058] The preparation steps are the same as those of W1 in Example 1, except that the Zn-MoS prepared in (1) in this example is used 2 Modified electrodes; the concentration of luminol in the electrolyte was 5 mmol / L, the concentration of sulfuric acid was 0.5 mol / L, and the electrochemical deposition was performed by cyclic voltammetry for 25 ...

Embodiment 3

[0066] Example 3 A hydrogen peroxide enzyme-free sensor based on molybdenum sulfide composite material, the specific preparation steps are:

[0067] (1) Zn-MoS 2 Preparation of:

[0068] The preparation steps are the same as that of Zn-MoS in Example 1 2 The method of preparation of the solution differs in: Zn Cl 2 The addition amount of ascorbic acid solution is 0.01 g, the addition amount of ascorbic acid solution is 6 mL, Na 2 MoO 4 The amount of solution added was 1.5 mL and Na 2 The amount of S added was 0.03 g, and the reaction was carried out at 220° C. for 12 hours.

[0069] (2) Preparation of ECL working electrode W1:

[0070] The preparation steps are the same as those of W1 in Example 1, except that the Zn-MoS prepared in (1) in this example is used 2 Modified electrode; the concentration of luminol in the electrolyte is 10 mmol / L, the concentration of sulfuric acid is 1.0 mol / L, and the electrochemical deposition is performed by cyclic voltammetry, and the c...

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Abstract

The invention discloses a method for preparing an enzyme-free dual-function hydrogen peroxide sensor based on a molybdenum sulfide composite material. The prepared sensor is simple to operate, convenient to carry, fast to detect, and low in cost, and can be used in daily production, life and other fields. Rapid, sensitive detection of hydrogen peroxide.

Description

technical field [0001] The invention relates to a preparation method of a sensor for detecting hydrogen peroxide, and the sensor integrates dual functions of electrochemiluminescence and photoelectrochemistry. It belongs to the field of new nano functional materials and electrochemical biosensing analysis technology. Background technique [0002] Hydrogen peroxide is an oxidizing agent, which can be decomposed into water and oxygen under normal circumstances, but it is relatively slow. When a catalyst (or biological enzyme) is added, the reaction speed is accelerated, so that the amount of hydrogen peroxide or the catalyst (or The amount of biological enzymes), and hydrogen peroxide often exists in the form of reaction intermediates in organisms. Therefore, hydrogen peroxide plays an important role in the fields of medical diagnosis, clinical treatment, environmental testing and food production. Research The development of hydrogen peroxide detection method also has very im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/36G01N27/32
CPCG01N27/32G01N27/36
Inventor 张勇孙旭任祥朱文娟杜斌
Owner UNIV OF JINAN
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